CN102553450B - Method for preventing split membrane bio-reactor (MBR) flat membrane pollution - Google Patents
Method for preventing split membrane bio-reactor (MBR) flat membrane pollution Download PDFInfo
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- CN102553450B CN102553450B CN201210027325XA CN201210027325A CN102553450B CN 102553450 B CN102553450 B CN 102553450B CN 201210027325X A CN201210027325X A CN 201210027325XA CN 201210027325 A CN201210027325 A CN 201210027325A CN 102553450 B CN102553450 B CN 102553450B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a method for preventing split membrane bio-reactor (MBR) flat membrane pollution. The method for preventing split MBR flat membrane pollution is characterized in that a bottom screen and a top screen are arranged in a membrane assembly box; filling material particles are arranged between the bottom screen and the top screen; and diameters of the filling material particles are greater than diameters of meshes of the bottom screen and the top screen. The method provided by the invention has the advantages that the filling material particles are arranged in a membrane bioreactor and are subjected to circulation stirring in the membrane assembly box so that the problem of an insufficient shear force produced by conventional aeration on a membrane surface is solved and a cleaning effect on a membrane surface is improved; a risk of membrane pollution is reduced without increasing of aeration quantity, breaking of a membrane surface and an influence on product water quality; chemical cleaning frequency is effectively reduced; and a time interval of membrane cleaning is prolonged by about 30%. Therefore, the method provided by the invention is a low-cost and high-efficiency membrane pollution-resistance method.
Description
Technical field
The present invention relates to a kind of method of preventing separated type MBR flat sheet membrane to pollute, and a kind of separate film biological reactor that can controlling diaphragm pollutes.
Background technology
Membrane bioreactor (Membrane Bio-Reactor, MBR) technique is a kind of water technology that the high performance membrane isolation technics is combined with the active sludge biological processing unit.Its maximum characteristics are: the materialization of water treatment extensive use processing and the two large processing methods of carrying out a biological disposal upon are combined into one.
MBR technique is based on the Biochemical Mechanism of activated sludge and the materialization mechanism of membrane filtration to removal of pollutants, and the metabolism of activated sludge is to remove the key link of pollutant, and biochemical degradation with exist synergy between film separates.Activated sludge process is the most widely used a kind of two stage biological treatment technologies in our times various countries, and membrane separation technique is introduced in activated sludge process, make the mud-water separation technology of activated sludge process that essential change occur, the sludge loss of Traditional Method and the disadvantage of expansion have been overcome, thoroughly separated hydraulic detention time (HRT) and sludge retention time (SRT), be conducive to hardly degraded organic substance decomposer etc. and breed the growth of microorganism slowly.
Compare with the traditional biological treatment process, MBR has the advantages such as flow process is simple, efficient is high, sludge concentration is high, excess sludge production is low, effluent quality is good, occupation area of equipment is little, capacity of resisting impact load is strong.Effluent quality can reach or be better than " People's Republic of China's miscellaneous domestic water quality standard (GJ25.1-89) ", directly the waters such as water reuse in the conduct, urban landscaping, cleaning, fire-fighting.And the crown_interception of film makes poky microorganism fungus kind be bred growth, enlarges the range of application of MBR technique, and this technology is a kind of technology of waste water control that develops rapidly in recent years, has become one of focus of present research and application.
Different according to membrane module and bioreactor combination mainly contain two kinds of MBR process configurations: immersion and separated type at present.The hydraulics operator scheme also comprises two kinds: pump is carried formula and gas stripping type.In addition, also have other two kinds of membrane process patterns, namely extract formula and diffusion type, but in these two kinds of patterns, the effect of film not that microorganism is separated from water.The membrane component aspect, although the film product of different geometries and configuration is arranged on film market, prevailing in commercialization MBR technology have three kinds, i.e. flat sheet membrane, doughnut and multitube film.
Immersion MBR directly is immersed in membrane module in activated sludge reaction to separate, and need not the mixed liquor loop of external membrane bioreactor, and percolate aspirates by negative pressure or gravity head drives, and the surface separation is discharged through film.Usually carry out aeration below membrane module, the inner loop that the ascending motion of bubble can cause liquid flows, and produces enough gas-liquid mixed shearing forces, to the film surface washing away, thereby can reduce mud in the deposition on film surface, can reach to a certain extent and control and the purpose of decelerating membrane pollution.
In separated type MBR, membrane module is independent of bioreactor.Muddy water mixed solution is sent into membrane module unit in loop by circulating pump, and under the driving of pressure differential, discharging after percolate separates by membrane filtration is held back mixed liquor and returned in reaction tank again.Separated type MBR is characterized in by feed liquid circulation cross-flow operation: stable and reliable operation, and operational administrative is easy, and membrane module is easy to change and set up.Film driving pressure (the Transmembrane Pressure of separated type MBR, TMP) and cross-flow rate produce by pump, usually in order to reduce pollutant in the deposition of face, need circulating pump that larger feed velocity is provided, so the power consumption of class MBR is larger, simultaneously frequent sludge reflux at a high speed form shearing force can destroy the mud flco, affect microbial growth and activity.
That membrane module form mainly contains is flat, tubular type, doughnut formula, spiral, capillary type etc.In separated type, flat, tubular type is used more in integral type, adopts doughnut formula and flat more.
MBR technique is as a new technique, and by more research, wherein the research aspect the water reuse was more in municipal wastewater, and the MBR case history has been arranged, and has also obtained good effect at nearly 2 years.The technical advantage of MBR, as high in sludge concentration, sludge age is long, determined that it can effectively process the unmanageable sewage of conventional method, this technique has also had successful application in the high concentrations such as percolate, pharmacy waste water, difficult waste water except application has comparatively widely been arranged aspect recycling municipal sewage.
Membrane bioreactor is an efficient water technology, yet still there is the defective of self in it as a kind of novel technology.Because film is easily polluted in running, cause membrane flux to descend, increased the replacement frequency of cleaning frequency membrane and film, directly affected efficient and the service life of membrane module, hindered its extensive use in practice.
Film pollutes some component that refers to be filtered in feed liquid and deposit the phenomenon that causes the film infiltration capacity to descend in film surface or fenestra, comprise that the little molecule solute of fenestra absorption, the large molecule solute obstruction of fenestra quilt cause that resistance of membrane filtration increases, film surface formation cake layer increases resistance to mass tranfer.Its permeation flux degradation after film pollutes is crossed film pressure and is increased, and holds back decrease in efficiency.
Film pollution affection factor numerous and complicated, middle film pollution factor are mainly from character, operating condition and the active sludge intermixture character of three aspect films.In the engineering operation process, mainly reduce the film pollution to the impact of system by the control operation condition.
The scheme that present stage film pollution is controlled can be summarized as following a few class:
The aeration control scheme, main by controlling aeration mode and intensity to the removal of film surface contaminant formation shearing force.For example, a kind of method and apparatus of jet airlift recirculated membrane bioreactor (application number/patent No.: 200810110776), the vigorous agitation effect of adopting jet-flow aeration to produce increases again the mass transfer rate in mixed liquor, accelerates biochemical reaction, reduces film and pollutes.Its limitation is that the change of aeration mode is larger to energy consumption requirement meeting, and the relative energy consumption that corresponding shearing force needs may be greater than adopting the energy consumption that other media rinse to be needed.
Extra electric field or ultrasonic wave antipollution scheme mainly produce repulsion and wash-out to membrane contaminant by external energy.For example, a kind of antifouling property of weak electric field raising film and method (application number/patent No.: 201010259595) of flux utilized, it is characterized in that utilizing principle of same-sex repulsion, apply weak negative electric field increase to the repulsive interaction of these pollutants near face, membrane contaminant is pushed away the film surface, therefore have the cake layer of delaying and form, increase the film antifouling property, improve flux, extend the effect of filtering the cycle of operation.Or a kind of method (application number/patent No.: 200510011799), adopt ultrasonic wave can realize that the On-line Control film pollutes development effectively under the surperficial cross-flow velocity of lower film of utilizing ultrasonic On-line Control film to pollute development.These class methods mainly rely on external energy to carry out antipollution, need extra increase equipment and energy consumption, increase the difficulty that operation and day-to-day operation are safeguarded.
Add the antipollution schemes such as medicament, mainly add the synergy of coagulated agent precipitation activated sludge or dependence zeolite powder and mud, alleviate the pollution on flat sheet membrane surface.As: (application number/patent No.: 201010101535), the coagulation activated sludge prevents the membrane contaminant that mud knot body produces to alleviate the integral method of enhanced coagulation-air lift that film pollutes-film and device.Or a kind of method (application number/patent No.: 200410052943) that alleviates flat sheet membrane-membrane pollution of membrane bioreactor, add a certain amount of zeolite powder, rely on the synergy of zeolite powder and mud, alleviate the pollution on flat sheet membrane surface, the decrease speed of effectively slowing down membrane flux.Adding medicament can increase operating cost, and adding coagulation-flocculation may exert an influence to the proterties of activated sludge, and itself belongs to macromolecular compound flocculant, may increase the weight of film and pollute.Zeolite Addition may be the effect of strengthened denitrification and that membrane contaminant is removed efficient is little, and can not reclaim, and economy is relatively poor.
The main cause of the generation that film pollutes is that the macromolecule organic of microorganisms is adsorbed on the flux that the film surface causes and descends, and existing film pollution control technology is used for alleviating that film pollutes is mainly also to prevent that this organic contamination is in the accumulation on film surface.This macromolecule organic is difficult to biodegradation in processing procedure, therefore, need to carry out enrichment to these pollutions and could fundamentally alleviate the film pollution with transfer.Because these macromolecule organic adsorption capacities are very strong, the shearing force that aeration forms also is not enough to the effects on surface adsorbate and removes, and external energy or medicament can promote ton cost of water treatment and may affect sludge character.
Summary of the invention
An object of the present invention is to provide a kind of method of preventing separated type MBR flat sheet membrane to pollute.
Another object of the present invention is to provide a kind of separate film biological reactor that can alleviate the film pollution.
The technical solution adopted in the present invention is:
A kind of method of preventing separated type MBR flat sheet membrane to pollute, being included in increases bottom and top mesh in the membrane module case, add granular filler between screen cloth, and the diameter of granular filler is greater than the mesh diameter of screen cloth.
Preferably, described granular filler is circular, can reduce the generation of gap clogging.
Preferably, the density of described granular filler is 1.1 ~ 1.2kg/m
3
Preferably, the volume of granular filler be between upper lower screen cloth box volume 10% ~ 20%.
Preferably, described granular filler is at least a in haydite, shell, polyurethanes, polypropylene.
Preferably, the diameter of described granular filler is 2 ~ 4mm.
Preferably, the mesh diameter of described screen cloth is 0.5 ~ 2mm, and further preferred, mesh diameter is 1 ~ 2mm, guarantees that the bubble shearing force that produces can promote packing layer.
Preferably, be provided with the replacement mouth on the membrane module case.
A kind of separate film biological reactor, comprise biochemistry pool and membrane cisterna, the membrane module case is placed in membrane cisterna, respectively there is one deck screen cloth 1 described membrane module case bottom with the top, be placed with flat sheet membrane group 2 in casing between two-layer screen cloth, add granular filler 3 in casing between two-layer screen cloth, the diameter of granular filler is greater than the mesh diameter of screen cloth.
Preferably, the gap in the flat sheet membrane group of described separate film biological reactor between each flat sheet membrane is 20 ~ 30mm, and when bubble agitation, 6-8 clearance rate doubly is not easy to produce and stops up.
Beneficial effect of the present invention is:
(1) method of the present invention is to have increased filler particles at membrane bioreactor, makes its stirring that circulates in membrane module, has made up common aeration for the deficiency of film surface shear power, improves the cleaning action for the film surface.At few aeration rate that increases, do not destroy the film surface, do not affect under the prerequisite of effluent quality, reduce film and polluted the risk that occurs, effectively reduce the frequency of Chemical cleaning, extend left and right interval time 30% that film cleans.A kind of method that is low cost, prevents and treats efficiently the film pollution.
(2) particles used cost is low, has rigid media to exist and can strengthen carbonated drink in the shearing force on film surface, and can adsorb colloid, protein, the lipid that forms pollution.The filler low price can be changed or take out and continue to use after cleaning natural air drying.
Description of drawings
Fig. 1 is separate film biological reactor structural representation of the present invention;
Fig. 2 is membrane module box structure schematic diagram of the present invention;
Fig. 3 is that intermembranous pressure reduction is relatively under identical service condition for MBR system and the contradistinction system of the embodiment of the present invention 1;
Fig. 4 is that Chemical cleaning time point and the corresponding membrane flux rate of recovery be relatively under identical service condition for MBR system and the contradistinction system of the embodiment of the present invention 1;
Fig. 5 is the effect that adopts Membrane Bioreactor for Wastewater Treatment actual dying of the present invention;
Fig. 6 is that intermembranous pressure reduction is relatively under identical service condition for MBR system and the contradistinction system of the embodiment of the present invention 2.
The specific embodiment
The present invention is further illustrated below in conjunction with embodiment, but be not limited to this.
The method 1 that embodiment 1 prevention separated type MBR flat sheet membrane is polluted
A kind of separate film biological reactor is comprised of biochemistry pool and membrane cisterna two parts, and the membrane module case is placed in the membrane cisterna (see figure 1).As shown in Figure 2, the present invention respectively arranges one deck screen cloth 1 in membrane module case bottom and top, be placed with flat sheet membrane group 2 in casing between two-layer screen cloth, add granular filler 3 in casing between two-layer screen cloth, the diameter of granular filler is greater than the mesh diameter of screen cloth, place aeration tube 4 under the screen cloth of bottom, be provided with replacement window 5 on the membrane module case, be used for replacing and the screen cloth cleaning of filler.
In the present embodiment, the mesh diameter of screen cloth is 2mm; Particles used filler is circular haydite, and density is 1.1kg/m
3, diameter is 2.5 ~ 3mm, the filler cumulative volume be between upper lower screen cloth box volume 12.5%; Flat sheet membrane group used, the gap between each flat sheet membrane are 25mm, and when bubble agitation, this clearance rate is not easy to produce and stops up.The bottom aeration adopts high pressure aeration, reduces air inflow and improves admission pressure.Increase aeration to the circulation stirring dynamics of filler.
The effect experiment
The device and the contradistinction system that in the experiment are all below an embodiment of the present invention 1 are made comparisons, and contradistinction system is that the device of embodiment 1 is not gone up lower screen cloth, does not add granular filler.
1. membrane bioreactor of the present invention is to communicating through the intermembranous pressure reduction in the flow situation
By finding out in Fig. 3, seeing through under flow of communicating, the intermembranous pressure reduction of filled particle system can effectively reduce film and pollute the time that produces under identical service condition.200 days intermembranous pressure reduction of contradistinction system operation is just up to 69 kpa, and between the system membranes of granular filler, pressure reduction is 34 kpa and add, and effectively reduces the film pollution level.Add the system of particle can reduce the frequency that film cleans, under the operating condition that communicates, operation scavenging period interval can be extended 30%.
2. Chemical cleaning frequency and the rate of recovery
By membrane bioreactor of the present invention and the contradistinction system stable operation cleaning frequency of 600 days with clean after the membrane flux rate of recovery relatively.The system that adds granular filler, the scavenging period interval extends, and the membrane flux rate of recovery can improve 3-5%(and sees Fig. 4).
3. membrane bioreactor of the present invention is removed efficient and MLSS load to COD
Build the system of a cover aquifer yield 30m3/d with membrane bioreactor of the present invention, its COD clearance and MLSS load are seen Fig. 5.Pilot test system stable operation 6 months, the stable water outlet of 180 days, when mud volume load average out to 8kgCOD/m3.d, the COD average removal rate is more than 95%.This explanation particle system can not have a negative impact to film, can guarantee water outlet efficient and contaminant removal capacity simultaneously.
The method 2 that embodiment 2 prevention separated type MBR flat sheet membrane are polluted
In the present embodiment, separate film biological reactor, the mesh diameter of screen cloth are 1.5mm; Particles used filler is circular shell filler (pecan shell is main), and density range is 1.1 ~ 1.25 kg/m
3, averag density 1.15 kg/m
3, diameter is 1.8 ~ 3mm, average diameter 2.2mm.The filler cumulative volume be between upper lower screen cloth box volume 20%; Flat sheet membrane group used, the gap between each flat sheet membrane are 20mm.The bottom aeration adopts high pressure aeration, reduces air inflow and improves admission pressure.Increase aeration to the circulation stirring dynamics of filler.
Membrane bioreactor is to communicating through the intermembranous pressure reduction in the flow situation
By finding out in Fig. 6, seeing through under flow of communicating, the intermembranous pressure reduction of filled particle system can effectively reduce film and pollute the time that produces under identical service condition.System operation 700 days adds between the system membranes of granular filler pressure reduction lower than the speed that contradistinction system raises, and effectively reduces the film pollution level.Add the system of particle can reduce the frequency that film cleans, under the operating condition that communicates, operation scavenging period interval can be extended.
Only for introducing preferred case of the present invention, to those skilled in the art, any apparent changes and improvements of carrying out in the scope that does not deviate from spirit of the present invention all should be regarded as a part of the present invention to above embodiment.
Claims (1)
1. separate film biological reactor, formed by biochemistry pool and membrane cisterna two parts, the membrane module case is placed in membrane cisterna, membrane module case bottom respectively arranges one deck screen cloth (1) with the top, be placed with flat sheet membrane group (2) in casing between two-layer screen cloth, add granular filler (3) in casing between two-layer screen cloth, the diameter of granular filler is greater than the mesh diameter of screen cloth, place aeration tube (4) under the screen cloth of bottom, be provided with replacement window (5) on the membrane module case, be used for replacing and the screen cloth cleaning of filler; The mesh diameter of screen cloth is 2mm; Particles used filler is circular haydite, and density is 1.1kg/m
3, diameter is 2.5～3mm, the filler cumulative volume be between bottom and top mesh box volume 12.5%; Flat sheet membrane group used, the gap between each flat sheet membrane are 25mm, and when bubble agitation, this clearance rate is not easy to produce and stops up; The bottom aeration adopts high pressure aeration, reduces air inflow and improves admission pressure, increases aeration to the circulation stirring dynamics of filler.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103011389A (en) * | 2012-11-06 | 2013-04-03 | 太平洋水处理工程有限公司 | Plate membrane biochemical reactor based on particle scrubbing technology |
| CN104355401A (en) * | 2014-10-27 | 2015-02-18 | 浙江开创环保科技有限公司 | Integral composite membrane bioreactor device |
| CN106957106A (en) * | 2016-01-11 | 2017-07-18 | 上海电气集团股份有限公司 | A kind of antipollution MBR membrane modules applied to small-sized water treatment facilities |
| CN107098469B (en) * | 2017-06-09 | 2023-04-21 | 中国农业大学 | Anaerobic reactor |
| CN107986433B (en) * | 2017-12-15 | 2021-06-15 | 山东建筑大学 | Porous filler coated MBR device and sewage treatment method |
| CN108771969A (en) * | 2018-06-12 | 2018-11-09 | 合肥丰洁生物科技有限公司 | One kind prevents from blocking membrane separation device |
| CN109019839B (en) * | 2018-08-29 | 2021-11-19 | 广州市环境保护工程设计院有限公司 | Lifting aeration oxygenation system |
| CN112387118B (en) * | 2019-08-19 | 2023-06-30 | 北京奥博水处理有限责任公司 | On-line self-cleaning ceramic membrane filter |
| CN110606554B (en) * | 2019-10-10 | 2020-06-26 | 江苏艾乐膜科技有限公司 | Sewage treatment MBR (membrane bioreactor) and sewage treatment method |
| CN110776092B (en) * | 2019-11-16 | 2020-10-23 | 威海启达机电科技有限公司 | MBR membrane bioreactor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100563798C (en) * | 2005-02-25 | 2009-12-02 | 日本碍子株式会社 | Film method of cleaning in the film separated activated sludge method |
| CN201427894Y (en) * | 2008-12-26 | 2010-03-24 | 九江学院 | Percussion flow aeration particle packing composite membrane bioreactor |
| CN101284698B (en) * | 2008-05-30 | 2011-12-28 | 北京清大国华环保科技有限公司 | Method and device of jet airlift recirculated membrane bioreactor |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100563798C (en) * | 2005-02-25 | 2009-12-02 | 日本碍子株式会社 | Film method of cleaning in the film separated activated sludge method |
| CN101284698B (en) * | 2008-05-30 | 2011-12-28 | 北京清大国华环保科技有限公司 | Method and device of jet airlift recirculated membrane bioreactor |
| CN201427894Y (en) * | 2008-12-26 | 2010-03-24 | 九江学院 | Percussion flow aeration particle packing composite membrane bioreactor |
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